climate control system

[lesgrt]

Originally Posted by dkrace67

Exactly, I couldn't get it into troubleshoot mode either, and (unfortunately) my scan tool doesn't allow me access to the climate control systems computer (or subsequent codes).
I was playing around with it a bit and I noticed that upon power up (just turn the key on, not necessarily starting the vehicle) the motor for the driver/passenger damper appears to go through a "homing" routine. Strange thing is, once it reaches full travel in one direction, it continues to try and move. Like it's driving itself in the same direction because it doesn't know it's reached the end of travel. I physically move the damper back a bit and it continues in that same direction, right back to the limit. After several times of this routine, it finally stopped and went back the other direction to that limit and continued to move against that limit. Finally, after a minute or so, it gave up and returned to a central position for what I can only assume is the preset temperature. After all that, it appeared to operate normally (i.e. - I could set the temp control and it would move accordingly). But, once I cycled power, the same behavior returned. The motor will continue to drive itself all the way to one end of travel, disregarding the preset temperature (which I left at around 72).

Hopefully someone is still reading this thread, if so, can some one explain what code 38 means in real english. I don't know what "serial data line failure with PCM" means. Thanks.

[jmkzperez]

The problem is your actuator, it is under the dash depending which side. The passanger side is under the glove box. It looks like a lop sided box with one end not stright. The drivers side is under the radio. If you relpace it, it might work but if it doesn't then just flip the door manually and it will work for now, until you replace your A/C programmer.

[jcolcla]

Been reading this subject. Son has similiar problems with his heat after episode of dead battery on 96
bonnebille. Unfortunately, the controls to check for codes are different than mentioned. His has Mode/Auto, Temp, Off, AC, Recurc, etc. How can I check for codes? jcolcla

[HotZ28]

Originally Posted by jcolcla

Been reading this subject. Son has similiar problems with his heat after episode of dead battery on 96
bonnebille. Unfortunately, the controls to check for codes are different than mentioned. His has Mode/Auto, Temp, Off, AC, Recurc, etc. How can I check for codes? jcolcla

Welcome to AF, unfortunately, you posted in the wrong forum (Buick) and this particular post is 5+-yrs old; so therefore, we suggest you start a new thread in the Pontiac BONNEVILLE forum with your questions, with a link to this post if so desired.